My Touchstream LP broke almost two years ago, and I've been quite unhappy with needing to type and mouse the traditional way that whole time. However, someone at work had one that had been broken for a while, but only needed to replace the ribbon cable between the halves. I bought the cable, it arrived this morning, and we managed to eventually install it. It's shorter than the one that come with it, so it's barely making contact and the halves are too close together. But, the keyboard works great. I'm suspecting I can make arrangements to buy the keyboard.
Now, I think the issue with my broken Touchstream isn't just the cable, but I may try to confirm that to see if replacing the cable is all I need to do with mine as well.